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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

William Optics Fluorostar FLT APO Refractors

William Optics Fluorostar FLT refractors are triplet apochromats aimed at serious deep-sky imaging and high-contrast visual use. The line includes the Fluorostar 91, 120, 132 and 156.

Matching correctors are part of the collection: the adjustable Flat6AIII for the FLT91, and the Ultra Flat 132 and Ultra Flat 156, both 0.79x reducers that flatten the field and shorten the focal length for faster exposures on these larger tubes.

Filters

$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00

William Optics Fluorostar 91

Options available

91mm Aperture Apochromatic Triplet FPL-53 Glass for Superior Color Correction Strehl Ratio Exceeding 0.95 3.3" Dual-Speed Rack & Pinion Focuse...

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$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00
$348.00 - $348.00
$348.00
$348.00 - $348.00
$348.00

William Optics Adjustable Flat6AIII for FLT91

WO-P-FLAT6AIII-M92

Dedicated Field Flattener for the William Optics FLT91 Telescope Corrects Field Curvature for Pinpoint Stars Edge-to-Edge Integrated Adjustment Ri...

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$348.00 - $348.00
$348.00
$348.00 - $348.00
$348.00
$3,598.00 - $3,598.00
$3,598.00
$3,598.00 - $3,598.00
$3,598.00

William Optics Fluorostar 120

Options available

120mm Aperture FPL-53 Triplet Apochromatic Optics 3.3" Rack & Pinion Focuser Built-in Camera Angle Rotator Integrated Bahtinov Mask Descrip...

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$3,598.00 - $3,598.00
$3,598.00
$3,598.00 - $3,598.00
$3,598.00
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00

William Optics Fluorostar 132

Options available

132mm Aperture, 910mm Focal Length (f/6.9) Air-Spaced Triplet Apochromatic Objective Premium FPL-53 Glass for Superior Color Correction Heavy-Duty...

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$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00
William Optics Ultra Flat 156 (0.79x Reducer)
$1,068.00 - $1,068.00
$1,068.00
$1,068.00 - $1,068.00
$1,068.00

William Optics Ultra Flat 156 (0.79x Reducer)

WO-P-FLAT-156

Reduces focal ratio by a factor of 0.79x Designed for Medium Format, Full Frame, and APS-C sensors 3-element, 3-group optical design Requires 75.5...

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$1,068.00 - $1,068.00
$1,068.00
$1,068.00 - $1,068.00
$1,068.00
William Optics Ultra Flat 132 (0.79x Reducer)
$1,068.00 - $1,068.00
$1,068.00
$1,068.00 - $1,068.00
$1,068.00

William Optics Ultra Flat 132 (0.79x Reducer)

WO-P-FLAT-132

Reduces focal ratio by a factor of 0.79x Provides a flat field for Full Frame, APS-C, and M4/3 sensors 3-element, 3-group optical design Connects ...

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$1,068.00 - $1,068.00
$1,068.00
$1,068.00 - $1,068.00
$1,068.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00

William Optics Fluorostar 156

Options available

156mm Aperture Triplet Apochromat 1217mm Focal Length (f/7.8) FPL-53 & Lanthanum Glass Elements 3.7" Rack & Pinion Focuser Thermally Stabl...

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$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00